Mumbai university > FE > SEM 1 > Applied Physics 1

Marks: 3M

Year: May 2013

Fermi Level and Fermi energy

• The energy of the highest occupied level at absolute zero temperature is called Fermi-energy.

• The corresponding level is called Fermi level.

• The energy levels are absolute zero above Fermi level are completely empty, while those below are completely filled.

Fermi-Dirac Distribution function.

$f(E) = \frac{1}{1 + e^{[(E - E_F)/kT]}}$

Where,

f(E) = Probability that energy level ‘E’ is occupied by an electron

$E_F$ = Fermi energy

k = Boltzmann constant

T = Absolute Temperature